Gas-burner.



H.1.FREYN.

l@A5 BUR-NER.

APPLICATION FILED 0126.26; 1516, 1,282,802@

wenn@ @ein gs), ma

3 sHEETswsH'EU 1.

` ul improvements in Gus-Burners,

T ossion HEENRCE J. FBEYN, 0F CHICAGO, ILLINO'IS, ASSIGNOR, BY MESNE ASSIGNMENTS, TG FREYN AND COMPANY, OF CHCGO, ILLNOIS, il. CORPORTIGN OF MANE.

GAS-BURNER,

Spcclcation of Letters Patent.

Patented @et 29, QiS.

Application le December 2S, 1916. Serial No. 338,882.

To all flu/wm t may concern.'

it. known that l, Hommes J. FREYN, s. citizen ot' the United States, residing :it icugo, in tlie county oool and State of ois, neve invented certain new enel useo which tlie following is a. specification.

lilly intention relates to gos burners, enti refers particularly. although not exclusively, to burners of relatively large size used for burning blast furnace gas, coke oven es, und the like, Wliere suoli gas is utilized lor the heating of boilers, Vblast furnace stoves, or for other similar purposes.

My present invention constitutes an imrovenientupon the construction of gas urners slioivn in my Letters 'Patent No. 1,233,461, grunted July 17,1917. ln the said prior construction' the burner is def signed particularly to be operatedl in connection with compressecl air or other ifiuicl which, is preferably introduced through a suitable pipe into an auxiliary zur inlet tube, from Wliicli it passes into u main air inlet 't tubo iviiicli extentie into tlie main casing oi.

tlie 'oui which, in turn', is provided with inl The compresse air or other L oy its espirating action serves to tlrsiv additional ltir into the :intl n" i. sir inlet tubes, sir inl contact with tlie gus l mixed tlierewitl i u it is one of 1 .ie o= w,ects of invention to improve the ispirati-ng effect oi the air or other fluid Wliicli is inti'oluoecl into tlie main sir inlet tube, und l have found that this result muy 1oe accomplished by providing this tube with a constriction resembling that of' the well-known Venturi' tube.

lt frequently happens that under certain conditions it is clesirablevto operate e gas 1ourner with compressed air or other .liuiol of comparatively high pressure, unler other conditions to operate it with Ycir introoliioeci under slight pressure, es, ioreminple, oy s, isn blower or tlie like, Wnile mitici" still other conflitions the inducing'etect of the'. gas itself is' suioient to. drew into the y present burner the properernount of air to form the desired mixture of gas and sir.

It is a further object of my invention to construct my improved burner so that by o. simple and inexpensive interchange of the parts carriefl by tlie moin nir inlet tube the burner rosy be aclaptccl to operate under the various conditions just outlined.

Other' objects and` advantages of' my invention will los more readily understood by reference to the accompanying drawings, in which* Figure l is e sifle elevation and partial vertical section showing s complete burner in connection with .a portion of e blast urnace stove, and also showing the manner of connecting the burner with tlie ges main, this burner being shown assembled for operation with compressed oir of compera-l tively high pressure;

Fig. Qis an enlarged end elevation of the l burner shown in Fig. l;

Fig. 3 is u vertical longitutlinul section' through the burner shown in Figs. and 2; F10. l 1s a fragmentary encl elevation slio'ving the operating Ineens For longitutlinally moving 'the burner;

' Fig. 5 is an end elevation ,of the burner l, E2 und 3, but assembled oission' ineens for operation uoetl under comparatively 51H3; Fig. 5 is u vertical longitudinal section through a portion oi the outer end of the Y burner, assemblefl as slioivn in @im 5;'

inlet tube; so that all the air is drawn into the burner by the action of the gas-itself;

Fig. 8 is a vertical longitudinal section' through a portion` of the outer en ,of the burner sssemblecl as shown in Eig. l7.

The gas main l0 is provided in its upper surface with an aperture 11, and carries en. eperturetl platform 1:2, which, in turn. cui:n ries the eperturecl burner support 13, which /is longitudinally movable through the in- .strumentality 'of the hand VWheel 14, the

inion 15. and the rack 16. This mechanism is old and well lknown, and forms no part cular in cross-section, tapers toward its in-` I ra `idly increasing diameter.' A

' il' 19 has the cir--v 23. The inner en 2l. bevond which there is a of my present invention.

The flan e 1T ofthey as burner is suitablybolted to t e flange/1g of the'burnersu port 13. The burner is provided with t e main casing'lt? which hasthe gas inlet'20,

which, in turn, communicates with the gas main 10 through the apertures of the platform '12 and the burner support 13, in the As `is most clearly` well-known manner. shown Iin Fig. 3, the casing 19,'which is cirner end tothe point of minimum diameter flare .22.: of

he outer end of the ca sin cular aperture 23, which receives the main air iiilet tube 24, the bearing of the tube 24 engaging the eriphery of the a erture il of the main air in et tube 24 is'tapering, as clearly shown'in Fig. 3,

- and its inner edge 26 isapproximately in l tube 24 may be moved in Wardlv by rotation of the r theplane of the most restmcted portion 21 bolts 28, the inner ends of which are screwed into the casing19,afnd the outer ends of which are threaded and carry the nuts 29.

`A pair of the nuts 29 engage opposite sur- @faces of each of the bosses 27, thereby. se-

curely lioldingthe air inlet tube 24 in position. It will be evident that by proper movement of the nuts 29 the main air inlet outwardly, the aperas desired, on its bearin ture 23. .The mam a inlet 'tube tive arba oi' these iii is'niay be regulated valves 3l, these ring valves being hold i adjusted position by means of the screa's Just beyond and inside of the air inlets El() the main air inlet tube 24 has a restriction 323, of the shape of the Well-known Venturi tube.

The outer end of the air inlet tube 24 has the inwardly-extending ange 34, to which may be interchangeably attached thevarious parts which adapt the burner for use under varying conditions. In the assembly of tbe burner illustrated in Figs. v1 to 3, inclusive,

the tapering auxiliary air inlet tube 35 extends into the mainair .inlet tube 24, and

its'inner en d is located substantially'in the plane of the restriction 33 of the-main air` inlettube 24. The flangel 36 of the auxiliary air inlet tube engages thefilange B4, andis held in positionby means of the bolts The' auxiliary air inlet tube 35 carries at its outer end the spider 38, which, in turn,.sup

ports'the compressed air 'pipe 39 extending serves to direct t vWithin which is formed the mixing cheI 24 is pro-. vided With the air init i 3G, and the effec- '.'pi'es'sed air serves `to draiv in additional air: .through the open end of the auxiliary air into the auxiliary'air, inlet tube4 35. compressed air pipe 39is provided with nozzle 40 havin a flaring end 4l, tvb

he incoming compressedv or other fluid in a diverging stream which. Whenv it reaches the inner end of the ausili ary air inlet tube yoccupies the eatin'` cross-sectional areao the latter-,and ser tov draw air into the auxiliary air inlet ti 35 through its open outer end. Continuous with the inner veiid 'or casing 19 is the mixinv chamber cosinei The casing 42 carries around idf riphery the secondary air inlet fra provided with the secondary air inl the effective area of which may be eg i by the ring valve 46. The inner ed secondary air inlet .frame 44 is provided 'with a paclrin ring wenn, uring operation of the i'irner., brought into engagement with the circular trame 4S mounted on the stove or furnace 49. Eis

clearly shown in Fig. 3, the inner end of the mixing chamber casing 42 is tapered so that. .an annularpassage 50 is provided through which additional or secondary air is drawn es and mixed With'the gas and air mixture which passes from the mixing chamber 4?, into the stove or'furnace 49.

. In Figs.'5 and 6 all the parts of the burner which; have described are the same as shown in Figs. .1 to 3, with the exception Vthatl the auxiliary air inlet tube 35 is removed and the tube 51 substituted therefor. This tube51 has the flange 52 engaging the flange 34, and is held in position by meansof the ici Ibolts 37. The tube 5l may be connected lwith a suitable source of low pressure air be readily understood:

lVhen it is desired to fmix a relatively large quantity of air with the gas and to utilize this air for ,the purpose of mixing relatively 10W pressure ,f ,ras'ivith it, the parts of my burner are assembled :is-shown in, Figs. l 'to 3, inclusive. Compressed air of relatively high pressure enters through the pipe 39, and ,by means of the nozzle 40 is irected in a 'diverging stream so that when y the latter reaches the innerend of the tube 35 the pressure of air is uniform throughout the entire cross-sectional area. The 'comf-"' iat; inlet tube 85. This body of air then passes causes e strong `imiueing eecft on and tugiering mein air inlet iuto the moin eir'in'let tube 2e eubetentielir in the piene of the venturi-like resti-iu#rm 33, wiiioii'serves to drew yin still editio oir. The rapid expansion of eir which just beyond the restriction 33 eene-ee .ne eie reunie through tlieinlets to be thooughiy mixefi with the eirf Corning erom the tube y35. with ,fzreduuiiy increasing velocity through tube 24, a on passage from the ietter is mixed; with t e gas which.' surrounds the tube one. wliioh lies entered the easing through the iniet 20. it Wi?. be evident that the air es it lleaves the euri of the eirfinlet tube 2 has reached its maximum velocity, enti thereby tire gee wiiioin is brougit into intimate contact with the oir by the 'taper of the easing i9. The rapid inerease iii diameter of the easing in its portion eeuees the ges enti oir to eereesed inv veioeity und to be with eeeln other, the thorough mining of the gee oir beige; oenipleteci es the mixture la tiienixing eiiember if passes the-ouf' it is desired to eciii. stiil eitionei eir to tile niiet 1re, tiie'iiog valve is .oriented te or eteut, erui es the gee fin oir mixture. passes eom 'the iimer end of the o eiieiiiioer so-eeiied seconery een through the annuler peseage@ enel is mixefi in stm/'e or urnaoe e9 'with the mixtire eeniing from tile mixing ehomber e3, Combustion then taires oeee witriin the stove or iuriiaee 9.

it 'xviii be evirient thetin tlie'og n Io1c the' f tile ernennt ges wir is ed- ?ee reguleteei by iongituinei ei?, of tie mein inlet tube 2li, time erose-seotiooei eree or the en- .ir passage formed. etween the mein 'iiiet tube und tiie tapering oortiee of the seeing .l

ln many inetenees it is ieu-ud setiseotory force ai? into the burner iin-:ler @emperefey io, nreseure instead oi using e reiei liig, y compressed eil' designed to loe i in connection with the essembiy oi@ u rte shown in Five. to 3. Under sueii eira o euinetuneee the assembly o shown in 5 and may be used, the air being ine trodueef?. through the zur pipe o under e Lew l then entreins This air ounces oit pressure. a i

in through the air 1nefiditionei oir drawn iets 30 enit-he additionai features of operetion of the burner areas previousiy escribed.

e o eonciitions of operation ere such if exereiseeesueient inniir. with it the required theeseembiy o parte eiiorlvn enti 2? ie used. in suffe ease the tue inne? en o tine eir ernourit of aie. 1 Figs. Z

QAil of the air *alien ingoia :niet tube 24 at its mexirnum velocity draws eir in vtiirougrgn the air inlets 3G, and the mixture passes through the mixing chamber 43, and, if desired, lies secondary air mixed with it, in the manner previously described. it wiil be evident to 'those skilled in the 'art thet changes een be made in the detailed eonetru'otion of the Various parts which 'lieve esoribefi without departing from the spirit and seo e of my invention, es defined in the appeued cientos.

@Vliet claim is:

l. in a ges burner, the combination of a casing having a ges inlet therefor, and an air inlet tube projecting into seid casing and having e tapered inner en, seid air tube having a venirmi-like restriction outside of its tapered inner, end.

2. in a ges burner, easing hei/ing e gas iniet therefor, and en air inet tube extending into said casing and vharing e tapered inner enel and having its outer eufi, projecting outside oi soiey eesing, seid air iniet tube "being gieoeided with en eir inlet outside oi soie. eeei igg and heviog a renturidike restriction between said inlet and. thetepered inner end o sei tube.

3. in e gee burner, tile combination of e casing having e ges inlet therefor, e main eir iniet tube extending into seid casing-end provided iin-auxiliary air tube extending into the end of seid mein air iniet tube and having its inner en. terminating substantially in the plone of said, restriction.

e. in e ges burner, vthe combination ofte easing having e ges inlet therefor, e mein eir with e venturi-like restriction, and

the eomi)iiuition of e f inlet tube extenoing into seid easing endprovieii with. e venturi-117%J restriction, an euxiiiery eir tube extendin2 into' the enel of seid mein air iniet tube and ii .fing its inner end terminating substantially in the piene of seid c it'riction, and means for introduoing iii' d under piessure into the outer end of seid auxiliary eil inlet tube'.

o. in. e ges. burner, ne combination of e easing having e ges inlet thereforge. mein air iniet tube extending into seid eaeingencl .lieving e tepered inner enel, a `'venteril-likeA restriction in seid mein air inlet tube outside of the tapered portion of said tube, e, tapered auxiliary air inlet tube "extending into the outer e116` of said mein air inlet tube and with its inner end terminating substantially. in the iene 'of seid restriction, and apipe extending into the outer end of seid zmxiliaryv air. inlet tube and adapted to introduce into the latter iiuid under pressure.

6. ln a gas burner, the combination of a casing having e gas inlet 'there'o a main air inlet tube extening into seid casing and having e. tapered inner end, a venturi-like restrietio in bald main air inlet tube, a plurelity of air inletskrond the peripheryof the outer' end of sald mein air inlet tube, a tapered auxiliary .air inlet tube extending 5 into saidmain'anr inlet tbe and h'vin'g its innerl end terminating substantially in the plane of saidrestriction, arid means for `mtroducin a uid under pi'essureinte; the outer en' of said auxiliaryygr ilet tube.

10 7. In a ges burner,the eombinetien ofa vieiep'- memset -casingvhinng a gas inlet therefor, van air inletibe extending iito said casing, and a lplilialitvof air-controlling devices adapted be selectively applied to the out-er end of 'seid air inlet tilbegvvhereby themin'troduetion l5 ofair inte seid a'i'lffrilet tube may vbe varied.

In .Witness whereof, Ihe'reunto. Subscribe my name thiswlst'dey of December, A. .13.1,` 

